HERMETIC-Pumpen GmbH
About us
HERMETIC-Pumpen GmbH
Sealless Technology Unlimited
HERMETIC-Pumpen GmbH is a leading developer and manufacturer of hermetically sealed pumps and pumping technologies. The specialist for canned motor pumps has earned a worldwide reputation for its safe and long-lasting pumps, which can be used for the most extreme applications and conveying hazardous media. HERMETIC pumps are suitable for fluid temperatures ranging from –160 °C up to +480 °C and system pressures up to 120 MPa. With power outputs from 1 kW to 690 kW, HERMETIC offers the largest capacity canned motor pumps on the market.
HERMETIC employs around 440 people at its headquarters in Germany and has subsidiaries in China and the USA. In conjunction with its worldwide service and contract partner network, HERMETIC offers reliable customer service over the entire life cycle of a plant.
Products
Single Stage Canned Motor Pumps (ISO)
Operational areas / applications For the safe transport of aggressive, toxic, hot, explosive, valuable and flammable liquids and liquefied gases. Model / design Horizontal, sealless spiral housing pumps in process design with completely closed canned motor with radial impeller, single-stage, single-flow. The connection measurements of the housing comply with EN 22 858 / ISO 2858. Canned motor pump type CN The CN model is a standard design of the HERMETIC canned motor pump and is suitable for conveying all common liquids that are not close to steam pressure (not boiling media). Canned motor pump type CNF The CNF model is the version for liquefied gases, boiling media and condensate. With an integrated auxiliary impeller and internal fluid return, it is suitable for conveying liquids close to steam pressure. Canned motor pump type CNK The CNK model is the version for conveying hot organic heat transfer oils as well as heating bath liquids. Depending on the application, this version are equipped with plate heat exchanger or tubular coolers.
Single Stage Canned Motor Pumps (API 865)
Operational areas / applications For the safe transport of aggressive, toxic, hot, explosive, valuable and flammable liquids and liquefied gases. Model / design Horizontal, sealless spiral housing pumps in process design with completely closed canned motor with radial impeller, single-stage, single-flow. Design according to API 685. Canned motor pump type CNP The CNP model is a standard design of the HERMETIC canned motor pump and is suitable for conveying all common liquids that are not close to steam pressure (not boiling media). Canned motor pump type CNPF The CNPF model is the version for liquefied gases, boiling media and condensate. With an integrated auxiliary impeller and internal fluid return, it is suitable for conveying liquids close to steam pressure. Canned motor pump type CNPK The CNPK model is the version for conveying hot organic heat transfer oils as well as heating bath liquids.
Multi Stage Canned Motor Pumps (ISO/API685)
CAM The pump output is delivered through the impellers and diffusers arranged one behind the other to the pressure nozzle and in this way an increase in pressure is achieved depending on the number of stages. The partial flow for cooling the motor and lubricating the slide bearings is tapped off on pressure side after the last impeller and after flowing through the motor is lead out again through the hollow shaft between the stages. Since, as a result, no heated part of the delivery flows back to the suction side considerably more stable NPSH values are produced in the part load range. Aggregates of multistage design can therefore be used for considerably smaller pumping capacities, than pumps of single-stage design.
Vertical Submerged Single- and Multi Stage Canned Motor Pumps
Information Operational areas / applications For the safe transport of aggressive, toxic, hot, explosive, valuable and flammable liquids and liquefied gases. Application sectors are tank farms, terminals chemical and off-shore plants, gas accumulators, and industrial plants. In addition to the optimum design for TCN and TCAM pumps there are various mounting options. Model / design TCN Horizontal, sealless spiral housing pumps in process design with completely closed canned motor with radial impeller, single-stage, single-flow. The connection measurements of the housing comply with EN 22 858 / ISO 2858. Model / design TCAM Horizontal, sealless section-type pumps with completely closed canned motor, with radial impellers, multi-stage, single-flow.
Liquid Ring Vacuum Pumps and Compressors
General LEDERLE-HERMETIC has been producing and successfully marketing both vacuum pumps and compressors to the whole world for decades. Operation, design and application have been constantly optimised and adapted to our customers’ requirements. The pumps are available in conventional sealed and hermetically sealed units. Magnetic coupled or canned motor design guarantees operation without leakage and minimal maintenance. The compact design enables simple, fast and economical maintenance. Design Liquid ring vacuum pumps are positive displacement compressors, which are equipped with single or double suction impellers, according to size. Liquid ring vacuum pumps do not need lubricants; there are no parts in direct contact inside the hydraulics. Therefore these pumps feature low noise operation as well as simple and robust design.